>> reporter: they tell us that meteors are rare, but they're whipping around us. this person was driving 280 one of the areas around the bay area, a bright flash of blue light streak across. it's kind of hard to see the color on the video, but witnesses say this thing was a very bright blue and maybe it's just because of what happened in russia that we're watching the skies a little closer, but experts say this likely also could have been a meteor or a meteorite, but there were no reports of it exploding and no reports of it hitting anything, unlike in russia where this thing happened on friday and now, nasa is saying that it was bigger, faster and stronger than they thought instead of 50 feet, it was 55 feet. instead of 33,000 miles per hour, it was going 40,000 instead of 300 kilotons of explosive power it was 500, it was as big as the biggest nuclear device in history that got the new measurements and checked the infra-sound stations around the globe and people in russia are scrambling to see if they can find chunk of it. a small chunk can sell for up to $4,000